ATV/UTV Piston and Ring Kits
ATV/UTV Piston & Ring Kits at JJ Motorsports
Rebuild your ATV/UTV engine with premium forged piston and ring kits from JJ Motorsports, featuring high-compression and big-bore options for massive power gains on Yamaha YFZ450, Honda TRX450R, Suzuki LTZ400, and more. These race-proven kits deliver superior durability and performance in off-road, trail, and dune conditions.
Shop Millennium, JE Pistons, and Wossner piston kits for championship-level quality. Explore related categories such as ATV/UTV engine for cylinders and gaskets, or ATV/UTV for cams and exhaust to complete your top-end rebuild and dominate the track or trail.
Top ATV/UTV Piston & Ring Kits
- Millennium Piston Kit K8897D500-2 – +5.00mm big-bore piston kit; forged for Yamaha YFZ450/R with rings, pin, and clips.
- JE Pistons Piston Kit 261546 – High-compression forged piston; includes rings and wrist pin for Honda TRX450R.
- Wossner Piston Kit 8094D050 – +0.50mm oversize piston kit; lightweight forged with moly coating for Suzuki LTZ400.
Browse our in-stock inventory below with same-day shipping and expert support. Free shipping on orders over $99! Questions? Contact us for fitment advice!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
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WSM Piston Kit - Polaris 500 - +.25 mm 50-311-04K
WSM
$125.82Quality and construction that meets or exceeds OEM, Feature improved E-clip design, Contain piston, rings, pin and clips, Additional rings available separately, Order one per cylinder, Skirts have a nonabrasive, expansion-retarding MOS2 coating to reduce...09103550- SKU:
- 09103550
- Availability:
- Ships Same Business Day
- Weight:
- 1.41 LBS
- BORE - OVERSIZE METRIC:
- +0.25 MM
- BORE SIZE METRIC:
- 92.25 MM
- PRODUCT NAME:
- PISTON KIT
- PISTON MATERIAL:
- ALUMINUM
- UNITS:
- KIT
- BORE - OVERSIZE:
- +0,25 MM
- MODEL:
- ORIGINAL
- RIDING STYLE:
- ATV
$125.82 -
WSM Piston Kit - Polaris 500 - +.50 mm 50-311-05K
WSM
$125.82Quality and construction that meets or exceeds OEM, Feature improved E-clip design, Contain piston, rings, pin and clips, Additional rings available separately, Order one per cylinder, Skirts have a nonabrasive, expansion-retarding MOS2 coating to reduce...09103551- SKU:
- 09103551
- Availability:
- Ships Same Business Day
- Weight:
- 1.35 LBS
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE METRIC:
- +0.50 MM
- BORE SIZE METRIC:
- 92.50 MM
- BORE - OVERSIZE:
- +0,50 MM
- RIDING STYLE:
- ATV
- UNITS:
- KIT
- MODEL:
- ORIGINAL
- PISTON MATERIAL:
- ALUMINUM
$125.82 -
WSM Piston Kit - Polaris 500 - +.75 mm 50-311-06K
WSM
$125.82Quality and construction that meets or exceeds OEM, Feature improved E-clip design, Contain piston, rings, pin and clips, Additional rings available separately, Order one per cylinder, Skirts have a nonabrasive, expansion-retarding MOS2 coating to reduce...09103552- SKU:
- 09103552
- Availability:
- Ships Same Business Day
- Weight:
- 1.31 LBS
- BORE - OVERSIZE:
- +0,75 MM
- MODEL:
- ORIGINAL
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- ATV
- UNITS:
- KIT
- BORE - OVERSIZE METRIC:
- +0.75 MM
- BORE SIZE METRIC:
- 92.75 MM
- PISTON MATERIAL:
- ALUMINUM
$125.82 -
WSM Piston Kit - Polaris 500 - +1 mm 50-311-07K
WSM
$125.82Quality and construction that meets or exceeds OEM, Feature improved E-clip design, Contain piston, rings, pin and clips, Additional rings available separately, Order one per cylinder, Skirts have a nonabrasive, expansion-retarding MOS2 coating to reduce...09103553- SKU:
- 09103553
- Availability:
- Ships Same Business Day
- Weight:
- 1.36 LBS
- BORE SIZE METRIC:
- 93.00 MM
- BORE - OVERSIZE:
- +1,00 MM
- BORE - OVERSIZE METRIC:
- +1.00 MM
- MODEL:
- ORIGINAL
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- ATV
- UNITS:
- KIT
- PISTON MATERIAL:
- ALUMINUM
$125.82 -
WSM Piston Kit - Standard - Yamaha 50-521P
WSM
$98.62New light weight design incorporates shorter piston skirts with an PTFE coating at critical wear points for quicker revs and less heat, Improved intake skirt with larger inlet ports for increased acceleration and overall performance09102729- SKU:
- 09102729
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- TYPE:
- DUAL RING
$98.62 -
WSM Piston Kit - .50mm - Yamaha 50-521-05PK
WSM
$103.55New light weight design incorporates shorter piston skirts with an PTFE coating at critical wear points for quicker revs and less heat, Improved intake skirt with larger inlet ports for increased acceleration and overall performance09102730- SKU:
- 09102730
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- TYPE:
- DUAL RING
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- BORE - OVERSIZE:
- +0,50 MM
- BORE - OVERSIZE METRIC:
- +0.50 MM
$103.55 -
WSM Piston Assembly 50-520-65
WSM
$155.79Coated with MOS2 for high performance and heat absorption, Ported to match WSM Banshee sleeves, Fit bores from 64mm to 70.5mm, Piston pin is 5mm higher on long rod pistons to accommodate long rod, Made in Germany09100260- SKU:
- 09100260
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- BORE - OVERSIZE:
- +1,00 MM
- BORE - OVERSIZE METRIC:
- +1.00 MM
- PISTON MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PISTON KIT
- STYLE:
- STANDARD BORE
- BORE SIZE METRIC:
- 65.00 MM
- RIDING STYLE:
- ATV
- UNITS:
- EACH
$155.79 -
WSM Piston Assembly 50-520-665
WSM
$155.79Coated with MOS2 for high performance and heat absorption, Ported to match WSM Banshee sleeves, Fit bores from 64mm to 70.5mm, Piston pin is 5mm higher on long rod pistons to accommodate long rod, Made in Germany09100263- SKU:
- 09100263
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- BORE - OVERSIZE METRIC:
- +2.50 MM
- BORE SIZE METRIC:
- 66.50 MM
- PISTON MATERIAL:
- ALUMINUM
- BORE - OVERSIZE:
- +2,50 MM
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- ATV
- STYLE:
- STANDARD BORE
- UNITS:
- EACH
$155.79 -
WSM Piston Assembly 50-520-5-665
WSM
$165.25Coated with MOS2 for high performance and heat absorption, Ported to match WSM Banshee sleeves, Fit bores from 64mm to 70.5mm, Piston pin is 5mm higher on long rod pistons to accommodate long rod, Made in Germany09100269- SKU:
- 09100269
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- BORE SIZE METRIC:
- 66.50 MM
- RIDING STYLE:
- ATV
- STYLE:
- LONG ROD WITH STANDARD BORE
- UNITS:
- EACH
- BORE - OVERSIZE:
- +2,50 MM
- BORE - OVERSIZE METRIC:
- +2.50 MM
- PISTON MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PISTON KIT
$165.25 -
WSM Piston Assembly 50-520-68
WSM
$185.83Coated with MOS2 for high performance and heat absorption, Ported to match WSM Banshee sleeves, Fit bores from 64mm to 70.5mm, Piston pin is 5mm higher on long rod pistons to accommodate long rod, Made in Germany09100270- SKU:
- 09100270
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- BORE - OVERSIZE METRIC:
- +4.00 MM
- STYLE:
- BIG BORE
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- BORE - OVERSIZE:
- +4,00 MM
- BORE SIZE METRIC:
- 68.00 MM
- PISTON MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PISTON KIT
$185.83 -
WSM Piston Assembly 50-520-685
WSM
$185.83Coated with MOS2 for high performance and heat absorption, Ported to match WSM Banshee sleeves, Fit bores from 64mm to 70.5mm, Piston pin is 5mm higher on long rod pistons to accommodate long rod, Made in Germany09100271- SKU:
- 09100271
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- STYLE:
- BIG BORE
- PISTON MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE:
- +4,50 MM
- BORE SIZE METRIC:
- 68.50 MM
- BORE - OVERSIZE METRIC:
- +4.50 MM
- RIDING STYLE:
- ATV
- UNITS:
- EACH
$185.83 -
WSM Piston Assembly 50-520-69
WSM
$185.83Coated with MOS2 for high performance and heat absorption, Ported to match WSM Banshee sleeves, Fit bores from 64mm to 70.5mm, Piston pin is 5mm higher on long rod pistons to accommodate long rod, Made in Germany09100272- SKU:
- 09100272
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- STYLE:
- BIG BORE
- BORE - OVERSIZE:
- +5,00 MM
- BORE - OVERSIZE METRIC:
- +5.00 MM
- BORE SIZE METRIC:
- 69.00 MM
- PISTON MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PISTON KIT
- UNITS:
- EACH
- RIDING STYLE:
- ATV
$185.83 -
WSM Piston Assembly 50-520-5-685
WSM
$197.10Coated with MOS2 for high performance and heat absorption, Ported to match WSM Banshee sleeves, Fit bores from 64mm to 70.5mm, Piston pin is 5mm higher on long rod pistons to accommodate long rod, Made in Germany09100277- SKU:
- 09100277
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- BORE - OVERSIZE:
- +4,50 MM
- BORE - OVERSIZE METRIC:
- +4.50 MM
- PISTON MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- ATV
- STYLE:
- BIG BORE LONG ROD
- UNITS:
- EACH
- BORE SIZE METRIC:
- 68.50 MM
$197.10 -
WSM Piston Assembly 50-520-5-695
WSM
$197.10Coated with MOS2 for high performance and heat absorption, Ported to match WSM Banshee sleeves, Fit bores from 64mm to 70.5mm, Piston pin is 5mm higher on long rod pistons to accommodate long rod, Made in Germany09100279- SKU:
- 09100279
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- RIDING STYLE:
- ATV
- STYLE:
- BIG BORE LONG ROD
- UNITS:
- EACH
- BORE - OVERSIZE:
- +5,50 MM
- BORE SIZE METRIC:
- 69.50 MM
- BORE - OVERSIZE METRIC:
- +5.50 MM
- PISTON MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PISTON KIT
$197.10 -
On Sale
VERTEX Piston Kit 22569200
VERTEX
MSRP: $150.95Now: $135.86Was: $150.95All pistons are heat-treated with a T-5 hardening and tempering cycle, All piston skirts are coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston life09101085- SKU:
- 09101085
- Availability:
- Ships Same Business Day
- Weight:
- 0.68 LBS
- CYLINDER DIAMETER METRIC:
- 68.00 MM
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- DISPLACEMENT:
- 207 CC
- PISTON DIAMETER METRIC:
- 67.95 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- CAST
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- STYLE:
- CAST REPLICA
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- ATV
- UNITS:
- KIT
MSRP: $150.95Now: $135.86Was: $150.95 -
On Sale
VERTEX Piston Kit - Standard 22984A
VERTEX
MSRP: $302.95Now: $272.66Was: $302.95All pistons are heat-treated with a T-5 hardening and tempering cycle, All piston skirts are coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston life09101089- SKU:
- 09101089
- Availability:
- Ships Same Business Day
- Weight:
- 1.02 LBS
MSRP: $302.95Now: $272.66Was: $302.95 -
On Sale
VERTEX Piston Kit 23104
VERTEX
MSRP: $189.95Now: $170.96Was: $189.95All pistons are heat treated with a T-5 hardening and tempering cycle, All piston skirts are coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston life, Cast piston kits are gravity cast aluminum alloy (not...09101090- SKU:
- 09101090
- Availability:
- Ships Same Business Day
- Weight:
- 1.37 LBS
- DISPLACEMENT:
- 660 CC
- PISTON MATERIAL:
- CAST
- PRODUCT NAME:
- PISTON KIT
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 9.1:1
- RIDING STYLE:
- UTV
- STYLE:
- CAST REPLICA
- CYLINDER DIAMETER METRIC:
- 100.00 MM
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- ATV
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON DIAMETER METRIC:
- 99.95 MM
MSRP: $189.95Now: $170.96Was: $189.95 -
On Sale
VERTEX Piston Kit 23104050
VERTEX
MSRP: $189.95Now: $170.96Was: $189.95All pistons are heat-treated with a T-5 hardening and tempering cycle, All piston skirts are coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston life09101091- SKU:
- 09101091
- Availability:
- Ships Same Business Day
- Weight:
- 1.35 LBS
- COMPRESSION RATIO IMPERIAL:
- 9.1:1
- RIDING STYLE:
- UTV
- STYLE:
- CAST REPLICA
- CYLINDER DIAMETER METRIC:
- 100.50 MM
- DISPLACEMENT:
- 660 CC
- ENGINE TYPE:
- 4-STROKE
- PISTON DIAMETER METRIC:
- 100.45 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- ATV
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- BORE - OVERSIZE:
- +0,50 MM
- BORE - OVERSIZE METRIC:
- +0.50 MM
- PISTON MATERIAL:
- CAST
- UNITS:
- KIT
MSRP: $189.95Now: $170.96Was: $189.95 -
On Sale
VERTEX Piston Kit 23104100
VERTEX
MSRP: $189.95Now: $170.96Was: $189.95All pistons are heat-treated with a T-5 hardening and tempering cycle, All piston skirts are coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston life09101092- SKU:
- 09101092
- Availability:
- Ships Same Business Day
- Weight:
- 1.38 LBS
- BORE - OVERSIZE:
- +1,00 MM
- CYLINDER DIAMETER METRIC:
- 101.00 MM
- RIDING STYLE:
- UTV
- BORE - OVERSIZE METRIC:
- +1.00 MM
- DISPLACEMENT:
- 660 CC
- PISTON DIAMETER METRIC:
- 100.95 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- CAST
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- COMPRESSION RATIO IMPERIAL:
- 9.1:1
- STYLE:
- CAST REPLICA
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- ATV
- UNITS:
- KIT
MSRP: $189.95Now: $170.96Was: $189.95 -
On Sale
VERTEX Piston Kit 23833A
VERTEX
MSRP: $268.95Now: $242.06Was: $268.95All pistons are heat-treated with a T-5 hardening and tempering cycle, All piston skirts are coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston life, Cast piston kits are gravity-cast aluminum alloy (not...09103673- SKU:
- 09103673
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
- PRODUCT NAME:
- PISTON KIT
- CYLINDER DIAMETER METRIC:
- 93.00 MM
- PISTON DIAMETER METRIC:
- 92.96 MM
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- RIDING STYLE:
- UTV
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 12.5:1
- DISPLACEMENT:
- 875 CC
- ENGINE TYPE:
- 4-STROKE
- STYLE:
- FORGED HIGH COMPRESSION
MSRP: $268.95Now: $242.06Was: $268.95
